Abstract: Clutch arrangement for a motor vehicle gearbox. The clutch arrangement has a housing and a clutch. The clutch is arranged in the housing and is arranged concentrically with a shaft, which extends in a longitudinal axis. The shaft is supported on the housing by means of a first shaft bearing adjacent to the clutch and by means of a second shaft bearing spaced at an axial distance from the clutch. The clutch arrangement has an actuator arrangement for actuating the clutch. The actuator arrangement is designed to exert an actuating force on the clutch in a first longitudinal direction. The actuator arrangement here being axially braced on the housing and a force flux being introduced into the shaft as a result of the actuating force. The first shaft bearing is arranged so that the force flux introduced into the shaft can be axially braced on the housing by way of the first shaft bearing.

Abstract: A one-way clutch is arranged between an output shaft of a speed increaser and a drive shaft of a generator in a wind power generator. The one-way clutch includes an inner ring, an outer ring, a plurality of rollers arranged between an outer periphery of the inner ring and an inner periphery of the outer ring, a cage that retains the rollers at predetermined intervals in a circumferential direction, and a plurality of elastic members that is attached to the cage and that urges the corresponding rollers in one direction. The cage includes a pair of axially facing annular portions and a plurality of cage bar portions formed separately from the annular portions, both axial end portions of each of the cage bar portions being fitted to the respective annular portions.

Abstract: A gear center-distance maintaining mechanism includes a first support body that rotatably supports a first gear to be rotated by driving force from a driving unit, a second support body that rotatably supports a second gear to be meshed with the first gear so as to transmit rotational force from the first gear to a rotating body, the second support body being movable relative to the first support body in a direction such that the second gear moves away from the first gear, an arc-shaped face provided in the second support body and centered on an axis of the second gear, and a restricting portion provided in the first support body and shaped like an arc centered on an axis of the first gear, the restricting portion restricting the movement of the second support body relative to the first support body by contact with the arc-shaped face.

Abstract: An energy storage and recovery system device (2) for a vehicle, comprising a flywheel (4), a first and a second set of gears (4; 6), and multiple wet multiplate clutches (10, 12, 14), wherein one of each gear set (4; 6) is arranged coaxially along a clutch shaft (34, 36, 38) with one of the clutches (10, 12, 14), and wherein the device (2) is coupled to the vehicle transmission, such that actuation of a clutch redirects the torque path via the gears, thereby enabling multiple ratios and therefore multiple speeds.

Abstract: A folding-top drive has a motor (13) that transmits forces to a first gear (14) and then to a folding-top linkage via a second gear (15). The first gear (14) and a guide (23) are pivoted to a housing (19) and a spring (22) acts on the guide (23). The first gear is guided on the guide (23) so that the guide (23) can be moved automatically with the first gear (14) counter to the force of the spring (22) from a first position where the gears (14, 15) engage to a second position where the gears (14, 15) are disengaged if a force on the first gear exceeds a defined limit. Additionally, the spring (22) can move the guide (12) automatically with the first gear (14) from the second position to the first position if the force on the first gear falls below the defined limit.

Abstract: A mechanical assembly for a power tool, and a power tool incorporating the mechanical assembly are provided. The mechanical assembly includes (i) a first member having a first axis and a first engagement portion inclined relative to the first axis, (ii) a second member having a second axis and a second engagement portion inclined relative to the second axis, wherein the first and second engagement portions engage each other by movement of the first and second members relative to each other in the direction of at least one of the axes; and wherein the first member is a ring gear and the second member is a central gear and the first and second engagement portions engage and disengage each other by movement of the second member within a space defined within the first member.

Abstract: A device, which connects a gearmotor to an aircraft wheel, comprising: a casing rotatably carrying a shaft driven by the gearmotor, the shaft having a fluted portion on which a gearwheel is mounted to slide along a longitudinal axis of the shaft without rotating relative to the shaft; a toothed ring for constraining to rotate with the aircraft wheel; and means for moving the gearwheel axially between a retracted position (disengaged from the toothed ring) and an engaged position (gearwheel meshes with the toothed ring). The means for moving comprises a hollow screw-and-nut assembly extending around the shaft, one of the elements being axially secured to the gearwheel but prevented from rotating by an anti-rotation member, and the other element of the screw-and-nut assembly being rotatably mounted inside the casing to be driven selectively by an electric motor so that rotating the electric motor causes the gearwheel to move axially.

Abstract: A rotating module for a clamping device is disclosed. More specifically, the rotating module includes a housing including a first connecting section having an end rotatably connected to an upper portion of a base frame and a second connecting section formed vertically to the first connecting section. An end portion of a connecting plate is connected to the second connecting section and a clamping device mounted at the other end of the connecting plate and configured to clamp a panel. A gear unit in the housing is rotated by receiving torque of the operating motor. Clutch units are mounted respectively in the first connecting section and the second connecting section, connected to the gear unit, and configured to selectively transmit torque of the gear unit to the first connecting section or the second connecting section so as to rotate the housing or the connecting plate.

Abstract: An operator ratchet mechanism for effecting reciproctable lateral movement if an element of a geared drive train in a door, gate or barrier operator. The operator ratchet mechanism can be utilised to cause disconnection between the geared drive train and an electric motor of the door gate or barrier operator to enable the door gate or barrier to me manually moved, and subsequent reconnection between the geared drive connection and electric motor. An embodiment of a tilt door operator which enables disconnection and reconnection between a geared drive train and an electric motor of the operator by effecting lateral displacement of an element of the geared drive train is also disclosed.

Abstract: A travel drive gear engagement mechanism for a tractor unit includes a clutch lever that has a cam portion. The clutch lever is configured to rotate between a first position and a second position at a point that is offset from a center of an elongated portion of the cam portion. The engagement mechanism also includes a connecting member that operatively connects the cam portion of the clutch lever to a drive gear of a tractor unit. The connecting member is operatively connected to the cam portion at the offset point. The clutch level and connecting member are configured such that the drive gear engages a track gear when the clutch lever is in the first position and disengages from the track gear when the clutch lever is in the second position.

Abstract: A system for rotating an element inside a pressure containing housing. In some embodiments, the mechanism includes a pressure containing housing having an opening through a wall of the housing into an internal chamber in which, in use, the element to be rotated is located, a bushing located within the opening, and a worm gear rotatably mounted in the bushing. The worm gear is offset from the axial centre of the bushing such that rotation of the bushing moves the worm gear between an extended position, wherein the thread of the worm gear engages an element in the chamber, and a retracted position, wherein the thread is disengaged from the element in the chamber.

Abstract: A device for connecting a gear motor to an aircraft wheel, the device comprising: a casing rotatably carrying a shaft that is to be driven by the gear motor, and on which a pinion is mounted idle by means of a rolling bearing; a toothed ring for being constrained in rotation with the aircraft wheel and arranged to mesh permanently with the idle pinion; and rotation securing means for selectively constraining the idle pinion in rotation with the shaft. With this structure, a smooth bearing is interposed between the shaft and the rolling bearing of the idle pinion.

Abstract: There is provided a transmission device comprising a rigid casing configured to be mounted perpendicularly on a pair of parallel rotatable driving and driven shafts. Annular driving and driven gears are provided in the casing. The annular driving gear is adapted for rotating simultaneously with the driving shaft, and is also adapted for forwarding rotational motion of the inner section to transmission means. The annular driven gear is adapted for engaging and rotating simultaneously with the driving shaft and sliding over the same, and for forwarding to the inner section rotational motion received from the transmission means. The transmission means is rotatively connected to the annular driving and driven gears for transmitting rotational movement of the driving shaft to the driven shaft. There is also provided a portable boring-welding apparatus using this transmission device and a method for rotating a driven shaft using a parallel driving shaft.

Abstract: At least a motor, a gear unit and an adjustment connection form an actuator. The gear unit is fitted with at least two mutually movable gear parts, as well as a spring acting on two of these that counteracts their movement out of an idle state. The gear unit is designed such that when an adjustment connection is blocked the motor moves the gear parts out of the idle state during operation to an operating point. In addition, the gear unit is designed such that during the movement out of the idle state it reduces the extent to which the movement is counteracted from a particular point upstream of the operating point.

Abstract: An actuator, especially for use in a game machine, includes a motor driving an output via a gear train. The motor is mounted to a support plate. The gear train includes a number of dual cogs rotatably mounted on fixed shafts. At least one of the fixed shafts is fixed to the support plate by way of a spacer. The support plate has a mounting hole formed in the support plate with an axially extending hollow boss and the spacer is fixed to the support plate by being press fitted into the mounting hole and boss. One of the fixed shafts is fixed to the support plate by a shaft seat which is fixed to the support plate by a snap-fit connection.

Abstract: A driveline includes a wet multi-plate clutch that can switch between a two-wheel drive state and a four-wheel drive state, and a disconnect mechanism that switches transmission/non-transmission of torque between a front differential and one of front wheels. When the driveline is switched from the two-wheel drive state to the four-wheel drive state, the wet multi-plate clutch is actuated to an engagement side, and thus the rotation of the front differential and that of the front wheels are synchronized, and after synchronization is finished, the disconnect mechanism is switched to the transmission state. After switching of the disconnect mechanism is finished, the wet multi-plate clutch is actuated to a disengagement side and returns to a standby position between a disengagement position in the two-wheel drive state and a synchronous position in which the disconnect mechanism is switched.

Abstract: A drive train apparatus (1) adapted for driving a pan and tilt head, which in use is intended to support a payload (for example a video camera), the apparatus includes respective successive drive elements (2, 3, 4) so coupled as to communicate a rotational movement applied at one end of the apparatus (1) from an output of a rotational input device (8) to a rotational output (16) disposed at the other end of the apparatus (1), in a manner whereby the rotational velocity of the rotational movement is reduced across the drive elements (2, 3, 4) thereby converting the torque applied to the input of each drive element (2, 3, 4) into an increased torque at the output of each drive element (2, 3, 4); a first stage one of the drive elements including a belt drive.

Abstract: A power transmission device and an image forming apparatus having the same that is capable of reliably transmitting intermittent power to a driven component from a driving source. The power transmission device includes a shaft, a first intermittent gear to receive power from the driving source and to rotate on the shaft, a second intermittent gear arranged so as to move between a first position in which the second intermittent gear is connected to the first intermittent gear along an axial direction of the shaft and a second position in which the second intermittent gear is disconnected from the first intermittent gear, a sliding unit arranged so as to slide along the shaft and to move the second intermittent gear in the axial direction of the shaft, and a driving unit to drive the sliding unit.

Abstract: A power transmission apparatus is provided with a first rotational member, a second rotational member, a clutch device for coupling a power transmission between the first rotational member and the second rotational member, and a ring shape actuator of the clutch device. A rotational axis of one of the first rotational member and the second rotational member penetrates through a radially internal space of the ring shape actuator.

Abstract: A maintenance device includes: a tube pump which suctions internal spaces of a cap via each of suction passages; a selective blocking mechanism which has a slider that establishes engagement with a carriage in a movement midway area of the carriage positioned on the path of movement to a maintenance area and is moved by being linked with the carriage, selectively blocks the suction passages according to movement of the slider, and releases the engagement between the slider and the carriage while maintaining a blocked state of the selected suction passage; and a separation and approach movement unit which establishes and releases the engagement between the slider and the carriage by moving the slider to approach or be separated from the carriage.

Abstract: A gear coupling device and a gear coupling method reduce a vibration and noise caused at the time of engagement of gears. The gear coupling device transmits power through the engagement of the gears and uncouples the gears from each other by causing at least one of the gears to move in an axial direction of the gear. A determining section determines, on the basis of signals detected by rotation sensors, whether or not an end surface of a tooth of the axially moving gear lies between an end surface of a first tooth of the other gear and an end surface of a second tooth of the other gear. A driving section causes the gear to move in the axial direction on the basis of the determination result of the determining section and causes the gears to be coupled to each other.

Abstract: A power transfer unit assembly for a vehicle. The power transfer unit includes a cantilevered ring gear assembly configured on a housing cover. The housing cover is configured to mate to a main housing that may be configured in a vehicle drivetrain. The power transfer unit may include at least one engagement mechanism configured to selectively engage and disengage the cantilevered ring gear assembly.

Abstract: An actuator arrangement comprises a pair of symmetrically loaded screw actuators driven from a common motor through respective drive shafts, and a protection arrangement arranged to avoid the continued application of full motor drive to one of the actuators in the event of the occurrence of a jam condition associated therewith.

Abstract: A gear mechanism for transmitting torques in both directions of rotation from a drive member driven in rotation to an output member arranged in the winding roller of a sun protection awning. Output member has a stop device with a hollow spindle connected to it, a travelling nut co-operating with hollow spindle and held non-rotatably thereon and stops for travelling nut. Output member is hollow and forms a unit at the end, remote from drive member. Housing of drive member is connected via first disengageable clutch to a guide tube for the non-rotatable retention of travelling nut in that it has a longitudinal groove in which a guide piece of travelling nut is guided. Drive member is connected via a second disengageable clutch to a drive shaft running freely in output member and hollow spindle. At its end, drive shaft is coupled to output member via a friction clutch.

Abstract: A screw-fastening tool having a continuously-variable transmission traction drive includes a continuously-variable transmission, a thrust cam mechanism of the continuously-variable transmission and a clutch plate of a fastening torque setting mechanism arranged in series between an electric motor and a spindle. A traction grease having a high traction coefficient is used as a lubricant for a traction drive. A grease reservoir or felt members in sliding contact with oppressing parts are disposed in a transmission case.

Abstract: A cranking pad assembly for a gearbox of a turbomachine including a cranking pad shaft rotatably secured in a gearbox housing and engageable with a gearbox drivetrain when urged inwardly into the gearbox housing. The cranking pad shaft includes an interface for a cranking tool. An interlock pin retains the cranking tool at the cranking pad shaft and a disconnect spring is operably connected to the gearbox housing to bias the cranking pad shaft outwardly from the gearbox housing.

Abstract: A power transmission switching mechanism for office machine is provided. The power transmission switching mechanism has simple structure and enables the office machine to commonly use a motor to execute scanning and printing works. The power transmission switching mechanism includes a rotary shaft, a drive gear mounted on the rotary shaft, an actuator reciprocally movable on the rotary shaft and a driving gear for transmitting power of a motor to the drive gear. The drive gear has a spline. The actuator can be selectively moved forward or backward to make the spline disengaged from a first gear mounted on the rotary shaft or engaged with the first gear. When the spline is disengaged from the first gear, the power of the motor is transmitted to a scanning module. When the spline is engaged with the first gear, the power of the motor is transmitted to the rotary shaft for printing work.

Abstract: An operating unit (5) for operating a window covering. The operating unit (5) includes a housing (11), a rotatable drive pulley (13) having an axis of rotation and first and second mounting positions in the housing, with respect to the axis of rotation, an engagement device (15), rotatable about the axis of rotation, and a brake mechanism (45, 47, 49) for, in use, arresting the engagement device when the drive pulley (13) is not rotated and preventing the engagement device and drive pulley from being back driven by the window covering. The engagement device (15) has a plurality of circumferentially spaced pins (19) parallel to the axis of rotation. The drive pulley (13) has a corresponding plurality of openings (17) facing the pins (19). In the first mounting position, the pins on the engagement device (15) engage with the corresponding openings (17) in the drive pulley and the engagement device rotates with the drive pulley.

Abstract: A shear gear arrangement with gear teeth on the bearing liner positioned to engage complementary teeth on a shear gear main body. The bearing liner is static, while the shear gear main body mounts on the rotating drive shaft. If a failure occurs, the drive shaft displacement causes the shear gear main body gear teeth to engage the bearing liner teeth, instantaneously loading the shear section of the shaft with a sufficient torque load to shear the section as designed.

Abstract: An automated system for testing a variety of transmissions and drive line gearbox components, and more particularly helicopter transmissions, for reliability, life expectancy, efficiency, and the like on a semi-automated basis. The system powers a unit under test with a pair of AC, variable speed drive motors connected to the transmission through relatively low speed gearboxes which in turn drive the input(s) of the test unit through geared cartridge spindles (GCSs) employing planetary gearset inputs driving a higher speed machine tool type spindle with an output chuck system which can automatically couple to adapters preloaded on the unit under test. Similar GCSs couple the outputs of the test unit to AC motors which act as generators to power the driving motors and thereby reduce the required electric power input to the losses in the system.

Abstract: A traverse mechanism for a toothed ring member includes an interface at which modular actuators are attachable to drive a sprocket. The sprocket is selectively movable to a disengaged position wherein the sprocket does not engage the toothed ring member, thereby enabling the use of the traverse mechanism in the event of a malfunction.

Abstract: A power split transmission includes a first power branch having a continuously variable transmission and a separable second power branch. The two power branches are combined again in a summation gear and a device connects or disconnects the second branch when a synchronous condition is present when changing from an initial driving range into a target driving range. A control device for controlling and adjusting the transmission ratio of the first power branch is connected to the continuously variable transmission. A predicting device for predicting an efficiency ?v of the first power branch in a target driving range is connected to the control device.

Abstract: An agricultural equipment drive system comprises a main drive shaft connectable to a power source, a first gear box, a second gear box and a second drive shaft. The first gear box has a first gear box input connected to the main drive shaft and a first gear box output at a first angle to the first gear box input. The second gear box has a second gear box input connected to the first gear box output and a second gear box output at a second angle to the second gear box input. The second drive shaft connects the first gear box output to the second gear box input.

Abstract: An image forming apparatus includes an image forming unit, first and second rotary shafts, a drive source to rotate at a predetermined low velocity and a predetermined high velocity, a first rotary transmitter connected between the drive force and the first rotary shaft, a second rotary transmitter connected between the drive force and the second rotary shaft, and a drive block member connected between the drive source and the second rotary shaft to block transmission of the drive force to the second rotary shaft when the drive source rotates at the predetermined high velocity. When the drive source rotates at the predetermined low velocity, the drive source drives the second rotary shaft using a difference in torque between an upper limit in high velocity rotation and an upper limit in low velocity rotation greater than the upper limit in high velocity rotation.

Abstract: The present invention provides a driving component, and a photosensitive drum and a process cartridge comprising the driving component. The driving component comprises a gear fixed at one end of the photosensitive drum and a longitudinal regulating component. The longitudinal regulating component comprises a first motion subassembly, a groove part and a central shaft part. The groove part has an upper chute and a lower chute which are orthogonal in space. The first motion subassembly forms relative slide coordination with the upper chute along a first direction. The central shaft part has a common axis with the gear which forms relative slide coordination with the lower chute along a second direction. The first direction and the second direction are all perpendicular to the longitudinal direction of the photosensitive drum.

Abstract: A drive train system comprising a power transfer unit configured to selectively transfer power from a front driveshaft of a vehicle by providing an output torque through a ring gear, wherein the power transfer unit includes an input shaft that receives torque from a first device, and a first clutch configured to selectively couple the input shaft to the ring gear when activated; a cardan shaft in rotational communication with the ring gear and configured to transfer the output torque; and a rear drive unit coupled to the cardan shaft and configured to selectively transfer the output torque received from the cardan shaft to a rear driveshaft of the vehicle, wherein the rear drive unit includes a torque shaft that is driven by the output torque received from the cardan shaft, and a second clutch that is configured to selectively transfer the output torque from the torque shaft to the rear driveshaft when activated.

Abstract: A worm gear clutch mechanism comprising a worm shaft (10), an output shaft (16) having a worm wheel (11), and means to move the worm shaft relative the worm wheel, the worm shaft being movable about a tilt axis that is substantially perpendicular to the longitudinal axis of said worm shaft (10) so that the worm shaft is movable into and out of engagement with the worm wheel.

Abstract: The lockable or releasable gear train with bidirectional input and one-way output relates to a transmission structure, wherein the rotary direction of the input shaft of the gear train with bidirectional input and one-way output is changed to make the direction of the output of the output shaft to be constant, which is characterized by releasing the lockable or releasable mechanism, the output shaft is moved reversely when reversely driven.

Abstract: A reduction gear capable of satisfying, at high level, each of: realizing a high reduction ratio; preventing backlash by securing rotation smoothness; and carrying out compactification and weight saving of entire mechanism is provided. The reduction gear of the invention is a modified crown reduction gear, comprising: a pressing mechanism 16 operated to rotate; a fixed crown gear 2 fixed to an external member 15; a movable crown gear 1, wherein the difference in the number of teeth between the gears is one; and an output axis 3 flexibly attached to the gear 1. The gear 1 engages with the gear 2 at a slant by pressing-force provided from the mechanism 16. In this instance, contact locations of teeth of the gears 1 and 2 are dispersed at two places existing at both sides between which a gradient center line intervenes.

Abstract: A gearbox for an aircraft has a first side wall, a second side wall, a gear train, and an aircraft accessory. The aircraft accessory has a housing, an input attaching to the gear train for receiving rotative input from the gear train, and a first shaft for selectively coupling and uncoupling the gear train from the input. The housing attaches to the first side wall and the second side wall.

Abstract: A robot arm has: a drive gear that has a shaft; a gear frame being capable of turning about the shaft of the drive gear; a first follower gear being capable of turning, in synchronization with the drive gear, about a shaft fixed to the gear frame, in a direction opposite to the turning direction of the drive gear; a transmission control mechanism that is capable of locking the first follower gear to the drive gear; an arm that moves in synchronization with the first follower gear; and a collision detection unit that is capable of detecting a collision between the arm and an obstacle. The transmission control mechanism unlocks the follower gear from the drive gear in response to detection, by the collision detection unit, of collision between the arm and the obstacle.

Abstract: This invention relates to a drive unit for driving a ring gear, comprising a motor, a transmission and a drive shaft, on which a pinion is arranged for driving the ring gear, wherein the drive unit includes a mechanical overload protection. In accordance with the invention the overload protection is arranged between the transmission and the pinion.

Abstract: A power transmission mechanism includes a rotational drive member which rotates to drive a driven member, a drive switcher for switching between a transmission-ON state in which a driving force of a drive source is transmitted to the rotational drive member to rotate the rotational drive member and a transmission-OFF state in which the transmission of the driving force to the rotational drive member is canceled, and a rotation restrictor which allows the rotational drive member to rotate when the drive switcher is in the transmission-ON state and is engaged with the rotational drive member to restrict rotation of the rotational drive member when the drive switcher is in the transmission-OFF state.

Abstract: A fast clutch mechanism for an industrial door is provided. A worm is connected to a motor shaft of the industrial door and meshes with a worm wheel which is rotatably mounted on an output shaft of a transmission box.

Abstract: A drive system with an 8-gear gearbox for a motor vehicle with a driving machine 11, more particularly an internal combustion engine, comprising a distribution gearbox 12 which is drivingly connected to the driving machine 11 and comprises three members, as well as two 2-gear partial gearboxes 17, 18, wherein a first member of the distribution gearbox 12 is drivingly connected to the internal combustion engine 11 and the two other members of the distribution gearbox 12 are each connected to an input shaft 20, 28 of one of the two 2-gear partial gear-boxes 17, 18 and wherein, between two members of the distribution gearbox 12, there is provided a switchable bridging coupling 19 and wherein one output element of each of the two 2-gear partial gearboxes 17, 18 is permanently drivingly connected to a driven gear 38, 39 or to a driven shaft 40.

Abstract: Reduction gear units are provided comprising a gearbox, a cam assembly, a bearing assembly, a first gear and a second gear. The first and second gears may engage one another and translate rotating movement from one axis to an axis perpendicular thereto. The second gear is disengagable from the first gear by action of the cam assembly, which is adapted to disengage the second gear from the first gear through eccentric rotation of the cam assembly. In one embodiment, a bearing assembly carried by the cam assembly is preloaded. The cam assembly is disposed so that the preloaded can be maintained during manufacture of the gearbox. In another embodiment, the gearbox case and cam assembly are disposed so as to minimize internal leakage from the case and enhance sealing of the gearbox.

Abstract: A gear including a pinion being integral with a rotatably mounted shaft in a support by a cleavable element arranged to disengage the pinion from the shaft in case of an overcouple between the pinion and the shaft is disclosed. A guiding bearing, pending between the pinion and the shaft, is arranged to rotatably guide the pinion around the shaft, in case of a disengagement of the pinion from the shaft. In a turbomachine, a gear box including such a gear allows the driving of auxiliary machines in case of a breakdown of a shaft in the gear box.

Abstract: A gear including a pinion, a shaft and a disc is disclosed. The disc includes a cleavable element arranged to disengage the pinion from the shaft in case of an overcouple between the pinion and the shaft. A guiding module of the pinion is arranged to maintain the pinion in rotation in the support in case of a disengagement of the pinion from the shaft. In a turbo-machine, a gear box including such a gear allows the driving of auxiliary machines in case of a breakdown of a shaft in the gear box.

Abstract: A system for rotating an element inside a pressure containing housing. In some embodiments, the mechanism includes a pressure containing housing having an opening through a wall of the housing into an internal chamber in which, in use, the element to be rotated is located, a bushing located within the opening, and a worm gear rotatably mounted in the bushing. The worm gear is offset from the axial centre of the bushing such that rotation of the bushing moves the worm gear between an extended position, wherein the thread of the worm gear engages an element in the chamber, and a retracted position, wherein the thread is disengaged from the element in the chamber.

Abstract: A quick-release gear assembly includes a retaining base having a base body and an elastic arm extending from the base body and provided at a distal end thereof with a first locating portion, and a gear having a gear body and a second locating portion located at the gear body and detachably engaged with the first locating portion of the retaining base for fastening the gear to the retaining base. Accordingly, the gear can be disassembled from the retaining base conveniently by disengaging the second locating portion of the gear from the first locating portion of the retaining base for the purpose of quick replacement of the gear.